Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| matrix-synapse(PyPI) | 0 | 1.120.1 | N/A |
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